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Effects of iohexol and iodixanol on ACh- and SNP-induced relaxations of isolated rings of rabbit aorta. (a) Pre-incubation with 10% iohexol and 30% iodixanol attenuated control ACh-induced relaxations to an equivalent degree. Thirty per cent iohexol further reduced the ACh-evoked response. (b) Control SNP-induced relaxations were unaffected by pre-incubation with either 10% iohexol or 30% iodixanol.
